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5-5 CW Mode
Reception
Set the controls and switches as outlined in section on
“FM Mode”, except that the MODE switch should be set
to CW. For reception, proceed as follows:
1. Turn the POWER switch ON and adjust the AF GAIN
control for suitable volume.
2. Turn the VFO knob slowly for the desired receive
Signal
so that a 800 Hz beat is heard. In this way, the frequen-
cy of your Station will coincide (Zero-in) with the fre-
quency of your party’s Station.
Similarly, if your Party
calls
back with a 800 Hz beat in
response to your
call,
it means that the party’s frequen-
cy has coincided with your frequency.
Note:
The 800 Hz beat can be checked by using a frequency
counter.
Transmission
Adjustments of the transmitter for CW Operation are
basically the same as for FM Operation. The transceiver will
be ready for use when adjusted in FM mode provided that
the frequencies are the Same.
For transmission, set the controls and switches as
outlined in section on “FM Mode”, except that the MODE
switch should be set to CW and the meter switch to
ALC/CEN. Connect your key to the KEY
jack
on the rear
Panel.
1.
Check to ensure that the MODE switch is set to CW. Set
the standby switch to SEND and the ON AIR indicator
will light. Under this condition, press the key down and
the ALC meter should deflect. Set the standby switch
back to REC Position.
Note:
If
the key is not connected, the ALC meter will deflect
when the standby switch is set to SEND.
2. Adjust the CAR LEVEL control
With the standby switch in the SEND Position, adjust
the control so that the ALC meter deflects within the
ALC zone when the key is pressed down.
Then, release the key. Set the standby switch back to
REC Position and the meter switch to RF/S Position.
Note:
If there is a Change in ALC meter deflection, reset in the
Same
manner as in the SSB mode.
3. Adjust the side tone
The TS-780 has a built-in side tone circuit for monitor-
ing your station’s CW
Signal
during transmission. To ad-
just the side tone volume, open the top cover and turn
the SIDE TONE control for desired level.
This adjustment should be made in receive mode with
the key pressed down (standby switch in REC position),
since, in so doing, the side tone circuit is activated.
Use of RIT
Switch
For detailed information, refer to section on “FM
Mode”. Use the RIT switch when your party’s frequency
has deviated from 800 Hz or you wish to transmit with a
different beat frequency.
Use of NB
Switch
Refer to section on “SSB Mode”.
Use of RF GAIN Knob
Refer to section on “SSB Mode”.
Use of
IF
SHIFT Control
By using the IF SHIFT in conjunction with the RIT, tone
quality can be adjusted.
Semi-Break-In Operation
The TS-780 is capable of semi-break-in Operation, in ad-
dition to the usual CW Operation with the standby switch.
The semi-break-in uses the side tone to activate the VOX
circuit which switches to transmit when the key is pressed
down and to receive when it isreleased. For semi-break-in
Operation, set the MODE switch to CW and the VOX
switch to ON. Other operating procedures are the same as
for the usual VOX Operation (Refer to 5-6).
Side tone
---l
is heard
from
Fig. 15 Semi-break-in Operation
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